I stayed at Miw's studio during my 1 week vacation in Bangkok and the accommodations were more than satisfactory. The room was large and well furnished. The wifi connection was fast and consistent. Miw's sister came to meet me in the lobby of the building for a no hassle check in. The view of the river, especially at night, was amazing. There is a BTS station about 10 minutes away by foot and there are bars, markets, and a plethora of different shops within close proximity. Once in the studio, the noise of the street melts away as you're 34 floors up.
My only complaint would be that after showering, there would be a pool of water outside the tub. It was not too big a hassle as there is a drain in the floor.
I would definitely recommend Miw's studio for someone looking for comfortable and affordable locations in Bangkok.